Oil and gasoline pump



Dec. 22, 1931. c. M. LARSON OIL AND GASOLINE PUMP Filed May 15 1929Patented Dec. 22, 1931 UNITED STATES CLIFFORD M. LARSON, on NEW YORK, nY.

0 am GASOLINE Pins/[n1 1 Application filetlMay 15,

This invention relates to-improvements in a means and method for readilyand efiiciently mixing-a motor fuel anda'lub'ricating liquid in the oneoperation of removing the two liquids from their respective storagetanks.

Great quantities of mixtures of gasoline and lubricating oil areconsumed annually as fuel for the usual two-cycle gasoline engine, inwhich the gasoline and oil are mixed in suitable proportions beforebeing fed to the engine. More particularly, the greatest use in theabove category is in so-called outboard motors." With the vast increasein theuse of outboard motors, which use variousproportions oflubricating oil mixed with gasoline, there is a real need for a pumpwhichwlilll t e '7 of gasoline, usinga heavy grade of oil, whereas forracing, as high as two pints of very heavy oil is required to be mixedwith the gasoline. There are some five or six blends of .motor oil andsome three grades of gasoline ly satisfactory. The procedure usuallyfol-.

lowed by outboard motor users is to purchase a quantity of gasoline andpump it into their gasoline tank; then place what they consider asuitable proportion of oil into the same tank, assuming that, inasmuchas the two substances are miscible, thatall requirements forproperoperation have been met. To one skilled injthe art thishaphazard methodis obviously objectionable to the proper opera tion of the engine and isaprocedure notcontemplated by the engineTdesigner as desirable forefficient operation, "since the oil in the tank immediately settles tothe bottom ings and following description.

2 is a profile-view 1929., Serial no. 363,163.

and the desired intimate mixture is not obtained. l r V Accordingly,"one of the important objects of the present inventionis to provide anovel method and means for intimately mixing varying proportions of oiland gasoline as desired at the same time these liquids are beingdispensed ata service or filling station.

Another important object ofthe invention is to provide aconvenient meansfor readily changing the proportions of the mixture.

provided, the stroke of one of the pumps being preferably maintainedconstant, whereas the stroke of the other pump may be varied by asuitable gear change mechanism, or "if desired, the stroke 'of eachpumpmay be variedmf f 1 Other and further important objects of theinvention will be apparent from the draw?) (In the drawings, Fig. 1 is avertical elevaother parts being shown in section."

and 3, respectively, said'cylinders beingdis- I posed parallel to eachother and also parallelto thelongitudinalaxis of the tank 1. The twocylinders 2 and 3 are shown vertically disposedwithin the tank andpositioned 'parallel to each other, but thepresent invention 0 itsbroadest aspect does not contemplateany specific disposition-of the saidcylinders.

More particularly, alplura lity of pumps :are

' tional'of thedevice of the present invention, parts being broken awayfor'clearness and V 1 V of thestroke chang- [Mounted within tank 1aretwo cylinders 2 Preferably the cross-sectional areasofthe twocylinders 2 and 3 should bear some convenient ratio to each other, suchas, for. example, 4 to 1, 5 to 1, 6 to 1, or the like,

A head lecomprises a closure for theme Q I tom of the cylinder. 2.Similarly, a head 5 forms aj-cl'osure for the bottom of the cylinrelation to the cylinder 3 as do the corresponding members v6, 7 and 8bear to the cylinder 2. In either case the threaded connecand-3 are tionof the two nipples to therespective heads is not shown inasmuch as thismeans of connection is conventional and will be apparent to thoseskilled in the art.

Slidably positioned within the cylinders .2 pistons 12' and 13, Vrespectively. Rigidly connected to the pistons 12 and. 13 are pistonrods 14 and 15, respectively. Each of the piston rods 14 and 15 extendsthrough a head or. top 16 of the tank 1 and terminates respectively inracks 17 and 18. i

Mounted upon the upper portion of the tank 1 are two standards orbrackets'l9 and 20. The bracket 19 containstwobearings, a

. lower bearing 21 and an upper'bearing 22.

The bracket 20 contains three bearings, a

lowest bearing 23 which is in alignment with the bearing 21, a middlebearing'24 which is in alignment with the bearing 22,. and an uppermostbearing-25. .Rotatably mounted I in the bearings 22' and'24 is a shaft26, upon one end of which is positioned a crankhandle 27. Asprocketwheel 28 is mounted upon the-other end of the shaft26,andisadapted to turn therewith. 1

A pinion 29 is rigidly mounted upon the shaft 26i'ntermediate thestandards 19 and 20 and adjacent the standard'19. This gear is adaptedto mesh with a spur gear 30 which in turn is loosely mounted vupon ashaft 31.

' A pinion 32 is also mounted loosely upon the. shaft 31 and'isconnected to the gear 30'to turn therewith. Thislast mentioned pinion,meshes with the rack 17 and, as is obvious, vlnovesthe rack when'thehandle 27 is turned.

7 It can be readily seen that the movement of I the handle '27 the rack17 and hence the piston 12,-are constant, but'in the broadest a pect ofthis invention, .byconventional transmissiongearing (not show) therelation-of themovements of the above mentioned memhers may be varied atwill. This gearing if desired may take a formsimilar to the change speedgearing associated with the rack 18,

ltoibe hereinafter fully described;

crank 27 the shaft 35 is rotated. Two sprockfet wheels 36 and 37 arerigidly mounted upon the shaft 35 intermediate the standards 19 and 20'.Chains 38 and 39 cooperate respectively with the two sprocket wheels-36and 37 Hand operatively c o'nnect the wheels 36 and 37 to a pairofsprocket wheels 40 and 41,-re-

spectively. The wheels 40 and 41 areloosely tive'ly I 1 by an obviousmanipulation of the clutch as shown-at 49 and 50, respectively, and, ad-

mounted upon the shaft 31 and both turn when the crank 27 is turned.

Keyed to shaft 31 is a clutch collar 42, said clutch collar beingadapted for restricted. slidable movement dependent upon the length of aslot 43 provided in the shaft 31 intermediate the two wheels 40 and 41.Each of the ends" 44 and 45' is formed. so as to register withcorresponding notches 46 and 47 provided in the wheels 40 and 41,respec- 7 I The sprocket wheels 36 and 37 are prefer- V ably of thesamediameter, whereas the wheels 40 and 41 are of different diameters.Hence,

collar. 42 theshaft 31 may be madeto rotate at various speeds relativeto the crank handle 27.] Rigidlymounted upon the shaft 31 and adapted tomesh withthe rack 18, is a pinion 48. Therefore,;for a given strokeofthe piston 12in the gasoline cylinder 2, the piston 13in the'oilcylinder 3 maybe moved various fractions of a stroke. I 1

, In'operationthe intakesi7 and 10 are connected to storage tanksaofgasoline and oil, respectively. Assume for the sake of illustration thatboth cylinders 2 and 3 are filled V V with gasoline and oil,respectively, and further, that a certain percent mixture is desired]The'gear ratio can readily beset and the crank turned. Thepistonsri'sein the cylinders at a rate proportional to the respectivepercentages. of gasoline and oil desired.

The tops of .the cylinders 2 and 3 are-open, jacent the'said openings,there are compartments 51 and 52, respectively. From the twocompartmentsthegasoline and oil-enter an e outlet pipe 53 and thencethrough a hose, or the like '(not shown) to the tank supplying- 0 themotor. The swirling motion of the '1iq ui'd entering and passingthroughthe outlet pipe 53 and the hose isrsuflicient to thoroughly mix the twofluids toproduce a'mixture satisfactory for the purpose. 11

In Fig. 3 a slight'modification of the in .vention is illustrated,wherein the-reference numeral 54indicates generally the usual gasolinepump, having a conventional crank handle 55. A'pipe'56 extends upwardlyfrom 11 the pump proper and serves the double purpose of being an outletfor gasoline from the I 1 pump and a suport for a platform ,56. Mountedupon the platform 56 is a cylindrical container 57. A piston (not shown)is operat-ively positioned in thecylinder'and the piston rod thereof isprovided with rack teeth, as shown at 58in *ig. 3; Positioned adjacentthe rack 58 is a pinion gear tnot.

shown)'which meshes therewith andrigldly connected to the said pinion issprocket wheel'59.- A chain 60 connects the wheel59 to asprocket' wheel61 mounted on the handle 55 and, as is obvious, turns the wheel-59 andhence moves the rack58 When thecrank 55 "1 30 is turned. An outlet pipe62 connects the top of the cylinder 57 to a hose 63. The pipe pistonsand means for varying the stroke of 56 also discharges into the saidhose.

In operation, the pump 54 is calibrated to deliver a given quantity ofgasoline for a predetermined number of rotations of the crank 55, and atthe same time a certain quantity of oil is delivered from the cylinder57. In this construction, the quantity of oil to be mixed ispredetermined and poured into the cylinder 57 and, as, the gasolineispuinped,

the oil contained in the oil cylinder is delivered to and intimatelymixed with the gasoline. This latterdevice is adapted for smallinstallations and is readily detachable from the pump 54 proper.

It is apparent that I have provided a novel means and method for readilyand eificiently mixing various quantities of oil with a given quantityof gasoline at the same time and by the operation which removestheliquids from storage. The device itself is comparatively economical toconstruct and will fill a long felt want. Incidentally, the quantity ofgasoline and oil consumed by engines of the type requiring mixed fuelscomprises approximately 15,000,000 gallons of gasoline and 3,100,000gallons of motor oil annually.

I am aware that many modifications may be made and many details ofconstruction altered without departing from the spirit of the invention,and hence I do not wish to limit myself to the specific structure shown.

By this dual pumping combination, it is possible to give tooutboardmotor engine users a device which will give them the correctproportion for grade of gasoline desired with the proper proportionandgrade of motor oil thoroughly mixed, so that when they get anoutboard motor fuel from such a pump combination, a great deal of thetrouble now being experienced will be eliminated. At the same time, itwill avoid the prohibitive expense of containers when such a mixture isput up by the oil company shipped to the pointof use and in additionthereto, will give a fresh mixture to the user, which is more desirable.I

In conclusion, it appears that through experiments and cooperation withcertain of the manufacturing companies, a fuel compound of gasoline andoilhas been worked out which has completely cured some of the mostpernicious and harmful ills of the outboard type of motor or any othertwo cycle type lubricated by placing oil in the fuel. The troubles thathave been eliminated are, roughly: uneven power development, difficultstarting, poor fuel economy. With these features corrected, morerevolutions per minute and more power is naturally obtained.

I claim as my invention:

1. A combination pump'for simultaneous- 1y dispensing and mixing fluids,comprising a plurality of cylinders having a common discharge outlet, acorresponding plurality of pistons, common means for operating saidmixing fluids, comprising a plurality of cylinders,a correspondingplurality of pistons, means for varying the stroke of one piston withrespectto the other, said means including a piston rod associated witheach piston, a rack formed at the end of each piston. rod,

a crank handle associated with the pump and a geartrain'connecting eachrack to the crank, one of the said gear trains bearing a constant.relation to the crank and the other train bearing a variable relationtothe crank.

4:. A combination pump for delivering a plurality of fluids, mixed indefinite proportions, comprising a plurality of cylinders, acorresponding pluralityof pistons and pis ton rods, a crank mounted onthe pump, and adjustable means associating the crank with the pistonrods whereby each piston is moved a different distance.

5. ,A combination pump for delivering a plurality of fluids, mixed indefinite proportions, comprising a plurality of cylinders, acorresponding plurality of pistons and piston rods, a crank mounted onthe pump, means associating the crankwith thepiston rods whereby .eachpiston is moved a different distance, said means comprising a rackformedat the end of each pistonrod, a fixed train of gears connecting thecrank and one rack and a variable set of gears connecting the crank andanother rack.

In testimony whereof I afiix my signature.

CLIFFORD M. LARSON. V

